The boy's father said the family has no clue as to why anyone would shoot up the house. The police have no motive.

The baby's father told WISN 12 News reporter Nick Bohr his uncle made a valiant effort to save the kids when the shooting started, but he couldn't get to Bill in time.

“To me, I don't know what to say, because my son's gone. I don't know what to say,” Bill’s father, Samboon Thao, said.

Samboon Thao wants to call attention to the shooting and urges the community to help find whoever shot up the house.

His 3-year-old son was playing with Bill and other cousins when the shooting started. An uncle grabbed the kids to the floor, but Bill was already hit. Samboon Thao had just dropped the family off when his wife called, devastated.

“Then my wife called me, ‘Come right now,’ and then she's crying a lot. I said, ‘What happened? But she didn't answer. She just hung up. And then when I came down here all the cops were already here,” Samboon Thao said.

"All my kids were playing in my living room. Most of them in the corner. Bill was in the window. And that's why he shot Bill," Bill's uncle, Xiong Thao, said.

Samboon Thao said that after two hours of surgery, doctors told him there was nothing more they could do because the wound was too big. He hopes the community will help catch his son's killer or killers.

“So they're not doing to other people like my son. I hope the cops catch whoever is doing this so that there's no more kids out there going the same way as my son,” Samboon Thao said.

The father told WISN 12 News the family is still planning the funeral, which will likely be Friday and Saturday.

"I feel bad for the family, and I hope they get whoever did this," neighbor Rozzelle Ferch said.

Last month, 5-year old Laylah Petersen was killed when a bullet flew into her Milwaukee family's home.

Milwaukee police said they're being proactive trying to stop the gun violence, even meeting with gang members.

“The callous disregard by this criminal element to pull the trigger not knowing where those bullets are going to go or how it's going to impact a family is just beyond belief,” Milwaukee Police Department Assistant Chief James Harpole said.

If anyone knows anything about the shooting death of Bill or Laylah, they are urged to call Milwaukee police at 414-935-7360. Tips can be left anonymously.